Buzz it out, will not be hard.+5 to 220 resistor as 1 lead, Gnd as 2nd lead.Connect + to a pin, touch gnd to all other pins, see if you can find 8 that light up.When you do, that + will be a common anode.If a grounded pin does not light up, that pin is also an anode.

More than likely it will be similar to this:http://www.futurlec.com/LED/LEDM88G.shtml